red lead


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red lead,

bright red to orange-red powder, also called minium, that is used in the manufacture of storage batteries, lead glass, and red pigments; a paint made with red lead is commonly used to protect iron and steel from rusting. Chemically, red lead is lead tetroxide, Pb3O4, a water-insoluble compound that is prepared by the oxidation of metallic lead or of litharge (lead monoxide); the commercial product sometimes contains litharge as an impurity.

Red lead

Commonly used as a rust-inhibiting primer on steel, but has been largely superseded by other primers due to the toxicity of lead.

red lead

[′red ′led]
(inorganic chemistry)

red lead

A lead compound, lead tetroxide; bright red to orange-red in color; used in corrosion-resistant paints as a rust inhibitor on iron and steel.

red lead

a bright-red poisonous insoluble oxide of lead usually obtained as a powder by heating litharge in air. It is used as a pigment in paints. Formula: Pb3O4
References in periodicals archive ?
* EPM/EPDM - Replacement of the customary 5 phr of either red lead or dibasic lead phthalate used to scavenge chloride in electrical insulation intended for wet locations.
* Polychloroprene - Replacement of the red lead cure in CR with X-1129 provides not only a chloride reaction product orders of magnitude lower in solubility, but also lends improved scorch safety.
Table 2 Lead stabilizer Low extractable blend Dibasic lead phthalate X-1129 Dibasic lead phosphite X-1179 Tribasic lead sulfate X-1132 Litharge X-1141 Red lead X-1185